Summer School "Ecology and Society: Frontiers and Boundaries" / 3 - 7 June 2019

Ecosystems societies Climate change Forests Hydrosystems Atmosphere Biodiversity Agrosystems Pressures Impacts Modelling Pollution Ecotoxicology Biogeochimical cycles Ecology Adaptability
Boat tripBoat trip
Forest tripForest trip
Vineyard - Crédits photo LabEx COTEVineyard - Crédits photo LabEx COTE
Visiting BordeauxVisiting Bordeaux
Commodifying ecosystemic servicesCommodifying ecosystemic services
Hydrosystems weekHydrosystems week
Field trip - SallesField trip - Salles
Visiting BordeauxVisiting Bordeaux
Field TripField Trip
Wine tasting - Crédits photo LabEx COTEWine tasting - Crédits photo LabEx COTE
Classroom - Crédits photo LabEx COTEClassroom - Crédits photo LabEx COTE
Class room - Crédits photo LabEx COTEClass room - Crédits photo LabEx COTE
Forest Trip - Crédits photo LabEx COTEForest Trip - Crédits photo LabEx COTE
Biogeochemical cycles of disrupted ecosystemsBiogeochemical cycles of disrupted ecosystems
Field trip - SallesField trip - Salles
Field trip - SallesField trip - Salles

Weak signals from an ecological and statistical perspective

Last update Monday 03 July 2017

by Frédéric Barraquand

In this talk, I will try to delineate how our ability to detect a difference of ecological relevance depends not only on a signal nature and strength, but also on ecological and observational noise as well as study design. Then I will explore several ways to obtain weak ecological signals despite reasonably large sample sizes: coarse measurement tools and multiple confounding factors. These notions will be illustrated with varied ecological case studies, from bird monitoring to threats to pollinators. I will then discuss recent attempts to infer signs of imminent ecological collapse from so-called early warning signals, that are often a rather weak manifestation of impending large-scale ecological changes.

Monday 03 July 2017 by GOUNY Claire.